문제
풀이
#include <algorithm>
#include <iomanip>
#include <iostream>
#include <vector>
using namespace std;
void solve(int idx) {
int n; cin >> n;
vector<double> v(n);
for (int i=0; i<n; i++) cin >> v[i];
for (int i=1; i<n-1; i++) {
v[i] = min(v[i], (v[i-1] + v[i+1]) / 2);
}
cout << "Case #" << idx << ": " << fixed << setprecision(5) << v[n-2] << "\n";
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int t; cin >> t;
for (int i=1; i<=t; i++) solve(i);
return 0;
}